In esophageal cancer, the patient is affected due to many reasons and one of the main reasons is persistent cough. Chronic cough or persistent cough is a cough that does not resolve or go away. Chronic cough is a symptom of other disorders and is not a disease.
http://hashocean.xyz/bitcoin/persistent-coughing-and-esophageal-cancer-bitcoin/
Persistent Coughing and Esophageal Cancer